Steps:
1. Create web component with shadow-root.
2. Attach all.css styles behide shadow root.
3. Add compoent with icon from WebComponentIcon font.
Result:
Icon are not displayed properly.
Hello, Andrey,
I can suggest checking the following thread on StackOverflow discussing the use of font icons in the shadow dom:
https://stackoverflow.com/questions/28794189/icon-fonts-in-shadow-dom
Regards,
Stefan
Progress Telerik